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Finding the Fourth Proportional to 1,642.80, 2,463.95 and 718.20

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Solution

The fourth proportional to 1,642.80, 2,463.95 and 718.20 is: 1,077.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,642.80 : 2,463.95 = 718.20 : x
  2. Step 2: Convert to fraction form
    1,642.80/2,463.95 = 718.20/x
  3. Step 3: Cross multiply
    1,642.80x = 2,463.95 × 718.20
  4. Step 4: Simplify right side
    1,642.80x = 1,769,592.98
  5. Step 5: Solve for x
    x = 1,769,592.98/1,642.80
  6. Step 6: Final answer
    x = 1,077.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.